Surgery of gastrointestinal bleeding of undetermined etiology.
D000368:Aged; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging / Q000601:surgery*; D006396:Hematemesis / Q000150:complications; D006801:Humans; D007084:Iliac Vein / Q000000981:diagnostic imaging; D007414:Intestinal Neoplasms / Q000150:complications; D007421:Intestine, Small; D007889:Leiomyoma / Q000150:complications / Q000473:pathology; D008297:Male; D008551:Melena / Q000150:complications; D008638:Mesenteric Arteries / Q000000981:diagnostic imaging; D008875:Middle Aged; D011859:Radiography